Recommendations

Both have very similar mature and positive approach to relationship. They have well written and developed characters and plots. They both have second leads that are interesting but don’t take up a large amount of screen time. There is medicine as a backdrop to the plot but isn’t the focus. They both have happy endings.

Technically, this won’t be anyone’s choice but I’d say…
- Both sacrifices for their twins and replace their position in the meantime
- Love blooms between the leads…
- please do add the remaining…

No gaming here, but both series have:

Green ML flags
Chinese history
A secret identity
Romance

The biggest difference is that in Arsenal Military Academy, you follow a young girl, who ends up crossing-dressing as her brother in the military (early 20th century/1900s) and finds someone special. There is also a lot of funny scenes.

Similar to this one, a woman who has a tough life at her company travels into a game - tricked by her idiot boss. Here, she finds real love.

Unlike "Love between Lines", she falls for an NPC, who only exists in the game.

-Ancient China
-Contrasting main leads, one a stern while the other is aloof
-Solving cases/mysteries

Third-year emergency medicine resident Tin has to cope with a deluge of different patients every day. Up until the eighteenth, that is. Tin's life is transformed when university student Tol's car is overturned, and he's rushed to the emergency room in serious condition. That night doesn't end when Tin fails to save Tol's life, though. When Tin next wakes, he finds himself in a time loop, a loop he won't be able to leave until he's altered Tol's fate.

25 years before Ikki, Daiji, and Sakura were born, a dying and critically injured man was brought into Noah, a scientific research organization. That man, Junpei Shiranami, was given a heart transplant by Masumi Karizaki and recovered. He is then given the Vail Driver and forced to become a powerful demon hunter. Junpei, whose parents were killed by demons, becomes Kamen Rider Vail with revenge in his heart that drives him to fight...

25 years before Ikki, Daiji, and Sakura were born, a dying and critically injured man was brought into Noah, a scientific research organization. That man, Junpei Shiranami, was given a heart transplant by Masumi Karizaki and recovered. He is then given the Vail Driver and forced to become a powerful demon hunter. Junpei, whose parents were killed by demons, becomes Kamen Rider Vail with revenge in his heart that drives him to fight...

25 years before Ikki, Daiji, and Sakura were born, a dying and critically injured man was brought into Noah, a scientific research organization. That man, Junpei Shiranami, was given a heart transplant by Masumi Karizaki and recovered. He is then given the Vail Driver and forced to become a powerful demon hunter. Junpei, whose parents were killed by demons, becomes Kamen Rider Vail with revenge in his heart that drives him to fight...

25 years before Ikki, Daiji, and Sakura were born, a dying and critically injured man was brought into Noah, a scientific research organization. That man, Junpei Shiranami, was given a heart transplant by Masumi Karizaki and recovered. He is then given the Vail Driver and forced to become a powerful demon hunter. Junpei, whose parents were killed by demons, becomes Kamen Rider Vail with revenge in his heart that drives him to fight...

25 years before Ikki, Daiji, and Sakura were born, a dying and critically injured man was brought into Noah, a scientific research organization. That man, Junpei Shiranami, was given a heart transplant by Masumi Karizaki and recovered. He is then given the Vail Driver and forced to become a powerful demon hunter. Junpei, whose parents were killed by demons, becomes Kamen Rider Vail with revenge in his heart that drives him to fight...

25 years before Ikki, Daiji, and Sakura were born, a dying and critically injured man was brought into Noah, a scientific research organization. That man, Junpei Shiranami, was given a heart transplant by Masumi Karizaki and recovered. He is then given the Vail Driver and forced to become a powerful demon hunter. Junpei, whose parents were killed by demons, becomes Kamen Rider Vail with revenge in his heart that drives him to fight...

Takarada Takara works for a company. On a rainy day, he walks helplessly without an umbrella. Somehow, he watches a stage play performed by theatrical troupe Eiyu. Takarada Takara becomes touched by Kamoshima Yujin's performance. Afterwards, Takarada Takara decides to quit his job and become an actor. He also joins theatrical troupe Eiyu.

Similarities: both MCs are in the acting/theatre world.

Differences: Double is a lot darker and has a bit of a unique plot for a BL centered on actors. A lot less fluffy romance and more... co-dependent? I can't think of a better for to describe it haha, I don't want to call it toxic but it's definitely not healthy.

A mysterious shop granting wishes and desires..... probably at the extend of exchanging lives.

*Spoiler*

While Unreal is about two high school bestfriends and TStHF is abou two 'past' lovers, the ways they are separate due to some circumstances and how one of them, in order to save the other one make an exchange/deals with a mysterious shop owner..... unknowingly becoming neverending deals that they need to overcome.

If you enjoy stories where deeply flawed characters become heroes in their pursuit of justice against untouchable corrupt elites, with a blend of action, legal drama, humor, and moral complexity, then 'Vincenzo' hits all those same notes.